Improvement in gas-regulators for vulcanizejs



a. m. HOPKINS.

Gas-Regulators for Vulcanizers;

Patented June 3,1873.

AM PnoroumosmPmcco.urwssomvsmaczssfl N ITE TATES GEORGE M. HOPKINS, OF ALBION, NEW YORK.

lMPROVEMENT IN GAS- REGULATORS FOR VULCANIZERS.

Specification forming part of Letters Patent No. 139,579, dated June 3, 1873; application filed October 19, 1870. a

To all tvhom it may concern:

Be it known that I, GEORGE M. HoPKrNs, of Albion, in the county of Orleans and State of New York, have invented certain lmprovements in Apparatus for Regulating the Flow of Gas for Heating Dentists Vulcanizers, and for other purposes, of which the following is a specification My invention relates to the combination of a suitable gas cut-off or stop with a steam-ga ge in such a manner that when the said gage shall indicate a given pressure only sufficient gas will pass through the cut-off to maintain that pressure, the object of this part of my invention being to maintiin a uniform temperature in the vulcanizer, and also to prevent explosions from over pressure.

Figure 1 shows the cutoff connected with a steam-gage. Fig. 2 shows the cut-off connected with a clock. Figs. 3, 5, and 6 are difl'erent forms of stops or cut-offs. Fig. 4represents a mercurial stcam'gage with my improvement attached.

In Fig. 1, A is a steamgage, constructed in any of the ordinary forms, provided with an adjustable index, B. O is a gas cut-01f, consisting of a suitable vessel, l partly filled with mercury or some other liquid, and closed at the top, excepting the holes through which the tubes 0, f, g, and h pass. The tube freaches just below the surface of the mercury. The tube g opens just above the mercury, and the tubes e and h open just below the top of the vessel D. j is a float, which rests upon the mercury. K is a wire, which passes down through the tube f, and is bent up and attached to the float j. It will be seen that, as the tubefopens below the surface of the mercury, the wire K has a perfect frictionless packing. The wire K passes up through an aperture in the steam-gage case, so, that the adjustable index B may strike it when the index proper indicates anv )ressure above that which is required. 9 and fareinlet gaspipes. The tubes h will allow only enough gas to pass through to keep the jet burning under the vulcanizer, while the tube g is large enough to allow sufficient gas to pass to supply the largest flame requirul. 'lhe'cutlet e is connected with a Bunsms or other burner,

which is placed under the vulcanizer. The

pressure is maintained. Shouldthetube g be entirely closed, the tube It will supply sufficient gas to support a small flame.

In Fig. 2,1 is a clock, of ordinary construetion, except that it is provided with anadjustable index, L. M is a cut-ofl, like the one shown in Figs. 1 and 3, except that the tube h is dispensed with. The wire K passes through an aperture in the clock-case, so that the index L may strike it any time at which it may be set, when the float j will be depressed, displacing the mercury, which will cover the mouth of the tube g, shutting off the gas entirely.

Fig. 4 represents an ordinary mercurial steam-gage, working with a diaphragm. The glass tube N is bent over at the top to make an outlet for the gas. An opening is made in it to receive the tube 0, which is open at the bottom and has a small hole drilled in it at p. The lower end of the tube 0 is placed at the point q g, at which it is desired to cut off the main flow of gas. The gage is connected with the steam-room ot' the vulcanizer, and the gas is taken in at r and out at s to supply the burner under the vulcanizer. When the pressure in the vulcanizer increases the mercury in the tube N is forced up and covers the end of the tube 0. The aperture 12 will then allow only enough gas to pass through to supply a small flame.

Fig. 5 represents a device for cutting off the supply of gas, similar to the one represented in Fig. l. T is a closed vessel containing mercury. u is an inlet-pipe, which is bent so that it may open upward, above the mercury. The tube f and wire K are arranged in the same manner as in Fig. 3, but the end of the wire is turned up and attached to the valve V; The valve V is made .to open or close the pipe to, as the wire K is acted upon by the steam-gage or clm k. 'w is the outlet.

Fig. 6 is a cut-off diti'ering from the others.

x is a suitable vessel containing mercury. y is the small inlet-pipe; z, the large one. 1 is the outlet. 2 is a cup-shaped vessel inverted, of a suitable size to slide easily in the vessel or; it is divided by the partition 3, which does not extend down as far as the sides of the Vessel. The partition 3 is placed between the pipe 2 and the pipes y and l. The edges of the vessel 2 dip in the mercury, while the partition 3 does not touch it. A wire, K, is attached to the vessel 2, and is operated upon by the steam-gage in the same manner as the wire K in Fig. 1. When the wire K-is depressed the partition 3 touches the mercury, thereby shutting off the large inlet-pipe z, and limiting the supply of gas to the small inlet 9 I claim as my invention- The combination of the gas cut-0ft G with the steam-gage A, substantially as and for the purpose hereinbefore set forth.

r GEO. M. HOPKINS.

Witnesses:

Geo. P. HOPKINS, G. F. (JURTIss. 

